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TRANSCRIPTION This is the synthesis of a strand of mRNA complementary to the gene on the DNA. The  instructions for making the specific protein are coded into the mRNA by the sequence of the  bases. As the mRNA is made, here is the way bases match up between DNA and RNA:   DNA bases                 RNA bases        Thymine- - - - - - - Adenine          Cytosine- - - - - -  -Guanine         Guanine- - - - - - - -Cytosine         Adenine- - - - - - - -Uracil (no tymine in RNA)   For transcription to occur, a supply of RNA nucleotides must available in the cell and the enzyme  RNA polymerase is required to catalyze the reactions. Since procaryocytes have no separate  nucleus, the process occurs in the cytoplasm. (It occurs in the nucleus of a eucaryotic cell.)  Steps  in transcription:    1. Gene for a needed protein is located.
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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